Shoe Arch Support via Stretchable Force Transmitter
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Solution Overview
Problem
Existing shoes fail to effectively prevent the decrement of longitudinal arch height during running motion due to insufficient transmission of tightening force to the arch support part, leading to inadequate support and increased pronation.
Innovation Solution
A shoe design featuring an arch support part that transmits tightening force from the upper, with a tightening force transmitter having higher stretchability than the arch support part, ensuring the force is effectively applied to support the longitudinal arch from underneath, and a support member that allows movement in the foot girth direction to enhance support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the arch support part is integrally formed with the upper, then the tightening force is dispersed to the upper, but the tightening force is not sufficiently transmitted to the arch support part
Solution Approach 1:
The upper is divided into distinct functional parts: the arch support part and the tightening force transmitter. This segmentation allows the tightening force transmitter to be optimized for force transmission while the arch support part is optimized for arch support, resolving the contradiction between structural integration and force transmission efficiency.
Solution Approach 2:
The tightening force transmitter acts as an intermediary component between the tightening tool and the arch support part. It mediates the transmission of tightening force, ensuring that sufficient force reaches the arch support part while still providing some dispersion to the upper structure.
2Strength
If the tightening force is transmitted to the upper, then the upper provides resistance, but the arch support part cannot firmly support the longitudinal arch
Solution Approach 1:
Different parts of the upper are given different mechanical properties. The tightening force transmitter is designed with higher stretchability to allow force transmission, while the arch support part is designed with lower stretchability and higher rigidity to firmly support the longitudinal arch. This local differentiation resolves the contradiction between upper resistance and arch support effectiveness.
Solution Approach 2:
The stretchability parameter is varied across different components. The tightening force transmitter has higher stretchability to facilitate force transmission, while the arch support part has lower stretchability to provide firm support. This parameter change allows both functions to coexist without contradiction.
3Force
If the tightening force transmitter has high stretchability, then the tightening force can be transmitted, but the support stability decreases
Solution Approach 1:
The system is segmented into two components with different stretchability characteristics. The tightening force transmitter has high stretchability for force transmission, while the arch support part has low stretchability for stability. This segmentation resolves the contradiction between force transmission and support stability.
Solution Approach 2:
Different local regions have different mechanical properties: the tightening force transmitter region has high stretchability while the arch support part region has low stretchability and high stability. This local quality differentiation allows both force transmission and support stability to be achieved simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The shoe effectively prevents the lowering of the longitudinal arch, reducing excessive pronation by ensuring a firm and stable support mechanism, allowing for better motion control and comfort during running.
Implementation Method 1
The tightening force transmitter has stretchability in foot girth directions set higher than that of the arch support part
Data Source
AI summary
A shoe includes: an upper; a tightening tool disposed above an instep of a wearer and capable of applying, to the upper, tightening force for drawing portions and on the both sides in a foot width direction of the upper; and an arch support part provided such that tightening force applied to a first side portion in a foot width direction of the upper can be transmitted to the arch support part. The tightening force transmitter has stretchability in foot girth directions set higher than that of the arch support part.